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      <a href="/2016/08/12/react-notes-2-create-login/" title="React使用笔记2--创建登录组件" itemprop="url">React使用笔记2--创建登录组件</a>
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    <time datetime="2016-08-12T15:34:32.000Z" itemprop="datePublished">2016-08-12</time>
    更新日期:<time datetime="2018-12-18T15:37:47.626Z" itemprop="dateModified">2018-12-18</time>
    
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			<strong class="toc-title">文章目录</strong>
		<ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#根据产品规划划分模块"><span class="toc-number">1.</span> <span class="toc-text">根据产品规划划分模块</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#主要页面逻辑"><span class="toc-number">1.1.</span> <span class="toc-text">主要页面逻辑</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#创建登录页面"><span class="toc-number">1.2.</span> <span class="toc-text">创建登录页面</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#React-Router"><span class="toc-number">2.</span> <span class="toc-text">React Router</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#安装使用"><span class="toc-number">2.1.</span> <span class="toc-text">安装使用</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#React-Router组件"><span class="toc-number">2.2.</span> <span class="toc-text">React Router组件</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#path属性"><span class="toc-number">2.3.</span> <span class="toc-text">path属性</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#Histories"><span class="toc-number">2.4.</span> <span class="toc-text">Histories</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#js中设置跳转"><span class="toc-number">2.5.</span> <span class="toc-text">js中设置跳转</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#添加路由"><span class="toc-number">3.</span> <span class="toc-text">添加路由</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#在index-js设置路由"><span class="toc-number">3.1.</span> <span class="toc-text">在index.js设置路由</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#在components里login-ejs添加路由跳转"><span class="toc-number">3.2.</span> <span class="toc-text">在components里login.ejs添加路由跳转</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#结束语"><span class="toc-number">4.</span> <span class="toc-text">结束语</span></a></li></ol>
		</div>
		
		<p>最近在学习使用React作为前端的框架，《React使用笔记》系列用于记录过程中的一些使用和解决方法。<br>本文记录搭建登录页面的过程。<br><a id="more"></a></p>
<h2 id="根据产品规划划分模块"><a href="#根据产品规划划分模块" class="headerlink" title="根据产品规划划分模块"></a>根据产品规划划分模块</h2><hr>
<h3 id="主要页面逻辑"><a href="#主要页面逻辑" class="headerlink" title="主要页面逻辑"></a>主要页面逻辑</h3><p>在这里，本骚年就建一个比较简单的项目。该项目与之前的Angular使用笔记项目长得完全一致，但我们这里用React来实现吧。</p>
<ul>
<li>我们的主要页面逻辑如下：<ul>
<li>1.登录页面，输入账号和密码即可</li>
<li>2.模块页面</li>
</ul>
</li>
</ul>
<h3 id="创建登录页面"><a href="#创建登录页面" class="headerlink" title="创建登录页面"></a>创建登录页面</h3><ul>
<li>首先我们在components文件夹内添加一个login.jsx</li>
</ul>
<figure class="highlight jsx"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">import</span> React <span class="keyword">from</span> <span class="string">'react'</span>;</div><div class="line"><span class="keyword">const</span> Login = React.createClass(&#123;</div><div class="line">  render() &#123;</div><div class="line">    <span class="keyword">return</span> (</div><div class="line">      &lt;div className="container" id="login"&gt;</div><div class="line">        &lt;form id="login-form"&gt;</div><div class="line">          &lt;h3 className="text-center"&gt;login&lt;/h3&gt;</div><div class="line">          &lt;div className="form-group"&gt;</div><div class="line">            &lt;label&gt;account&lt;/label&gt;</div><div class="line">            &lt;input type="text" className="form-control" placeholder="Account" ref="loginName" required /&gt;</div><div class="line">          &lt;/div&gt;</div><div class="line">          &lt;div className="form-group"&gt;</div><div class="line">            &lt;label&gt;Password&lt;/label&gt;</div><div class="line">            &lt;input type="password" className="form-control" placeholder="Password" ref="loginPwd" required /&gt;</div><div class="line">          &lt;/div&gt;</div><div class="line">          &lt;button type="submit"  className="btn btn-default" onClick=&#123;this.loginSubmit&#125;&gt;登录&lt;/button&gt;</div><div class="line">        &lt;/form&gt;</div><div class="line">      &lt;/div&gt;</div><div class="line">    )</div><div class="line">  &#125;</div><div class="line">&#125;);</div><div class="line"></div><div class="line">module.exports = Login;</div></pre></td></tr></table></figure>
<ul>
<li>在jsx中，因为js中class为保留字，所以要写成className</li>
<li>此处引用了Bootstrap的样式，在templates/index.ejs中添加</li>
</ul>
<figure class="highlight html"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line"><span class="tag">&lt;<span class="name">link</span> <span class="attr">rel</span>=<span class="string">"stylesheet"</span> <span class="attr">href</span>=<span class="string">"https://maxcdn.bootstrapcdn.com/bootstrap/latest/css/bootstrap.min.css"</span>&gt;</span></div></pre></td></tr></table></figure>
<h2 id="React-Router"><a href="#React-Router" class="headerlink" title="React Router"></a>React Router</h2><hr>
<h3 id="安装使用"><a href="#安装使用" class="headerlink" title="安装使用"></a>安装使用</h3><ul>
<li>通过npm安装</li>
</ul>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">$ npm install <span class="built_in">history</span> react-router@latest</div></pre></td></tr></table></figure>
<ul>
<li>还需要安装history，它也是React Router的依赖，且在npm 3+下不会自动安装</li>
</ul>
<figure class="highlight bash"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line">$ npm install --save <span class="built_in">history</span></div></pre></td></tr></table></figure>
<ul>
<li>添加Route组件</li>
</ul>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><div class="line">1</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">import</span> &#123; Router, Route, Link, hashHistory, IndexRoute &#125; <span class="keyword">from</span> <span class="string">'react-router'</span>;</div></pre></td></tr></table></figure>
<h3 id="React-Router组件"><a href="#React-Router组件" class="headerlink" title="React Router组件"></a>React Router组件</h3><ul>
<li>Router组件<br>Router组件本身只是一个容器，真正的路由要通过Route组件定义。</li>
<li><p>Route组件<br>Route组件还可以嵌套。</p>
<figure class="highlight html"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div></pre></td><td class="code"><pre><div class="line"><span class="tag">&lt;<span class="name">Router</span> <span class="attr">history</span>=<span class="string">&#123;hashHistory&#125;</span>&gt;</span></div><div class="line">  <span class="tag">&lt;<span class="name">Route</span> <span class="attr">path</span>=<span class="string">"/"</span> <span class="attr">component</span>=<span class="string">&#123;App&#125;</span>&gt;</span></div><div class="line">    <span class="tag">&lt;<span class="name">Route</span> <span class="attr">path</span>=<span class="string">"/repos"</span> <span class="attr">component</span>=<span class="string">&#123;Repos&#125;/</span>&gt;</span></div><div class="line">  <span class="tag">&lt;/<span class="name">Route</span>&gt;</span></div><div class="line"><span class="tag">&lt;/<span class="name">Router</span>&gt;</span></div></pre></td></tr></table></figure>
</li>
<li><p>Link组件<br>Link组件用于取代<a>元素，生成一个链接，允许用户点击后跳转到另一个路由，可接收Router的状态。</a></p>
</li>
<li>IndexLink组件<br>如果链接到根路由/，不要使用Link组件，而要使用IndexLink组件。</li>
<li>IndexRoute组件<br>IndexRoute显式指定Home是根路由的子组件，即指定默认情况下加载的子组件，即该路径的index.html。</li>
<li>Redirect组件<br>Redirect组件用于路由的跳转，即用户访问一个路由，会自动跳转到另一个路由。</li>
<li>IndexRedirect组件<br>IndexRedirect组件用于访问根路由的时候，将用户重定向到某个子组件。</li>
</ul>
<h3 id="path属性"><a href="#path属性" class="headerlink" title="path属性"></a>path属性</h3><p>Route组件的path属性指定路由的匹配规则。<br>path属性可以使用相对路径（不以/开头），匹配时就会相对于父组件的路径。</p>
<ul>
<li>:paramName<ul>
<li>匹配URL的一个部分，直到遇到下一个/、?、#为止。</li>
<li>这个路径参数可以通过this.props.params.paramName取出。</li>
</ul>
</li>
<li>()<ul>
<li>()表示URL的这个部分是可选的。</li>
</ul>
</li>
<li><em>
</em>匹配任意字符，直到模式里面的下一个字符为止。匹配方式是非贪婪模式。</li>
</ul>
<hr>
<p>**匹配任意字符，直到下一个/、?、#为止。匹配方式是贪婪模式。</p>
<h3 id="Histories"><a href="#Histories" class="headerlink" title="Histories"></a>Histories</h3><p>React Router是建立在history之上的。 简而言之，一个history知道如何去监听浏览器地址栏的变化，并解析这个URL转化为location对象，然后router使用它匹配到路由，最后正确地渲染对应的组件。</p>
<ul>
<li>createHashHistory<ul>
<li>这是一个你会获取到的默认history，如果你不指定某个history（即 <router>{/<em> your routes </em>/}</router>）。</li>
<li>它用到的是URL 的hash（#）部分去创建形如example.com/#/some/path的路由。</li>
<li>?_k=ckuvup是每一个location创建的一个唯一的key，并把它们的状态存储在session storage中。当访客点击“后退”和“前进”时，我们就会有一个机制去恢复这些location state。可使用queryKey: false关闭。</li>
</ul>
</li>
<li>createBrowserHistory<ul>
<li>Browser history使用History API在浏览器中被创建用于处理URL，新建一个像这样真实的URL example.com/some/path。</li>
<li>使用Browser history需要在服务器进行配置。</li>
</ul>
</li>
<li>createMemoryHistory<ul>
<li>Memory history不会在地址栏被操作或读取。</li>
</ul>
</li>
</ul>
<h3 id="js中设置跳转"><a href="#js中设置跳转" class="headerlink" title="js中设置跳转"></a>js中设置跳转</h3><ul>
<li>使用browserHistory.push</li>
</ul>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">import</span> &#123; browserHistory &#125; <span class="keyword">from</span> <span class="string">'react-router'</span>;</div><div class="line">example(event) &#123;</div><div class="line">  browserHistory.push(path);</div><div class="line">&#125;</div></pre></td></tr></table></figure>
<ul>
<li>使用context对象</li>
</ul>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">export</span> example React.createClass(&#123;</div><div class="line">  <span class="comment">// ask for `router` from context</span></div><div class="line">  contextTypes: &#123;</div><div class="line">    <span class="attr">router</span>: React.PropTypes.object</div><div class="line">  &#125;,</div><div class="line">  example(event) &#123;</div><div class="line">    <span class="keyword">this</span>.context.router.push(path)</div><div class="line">  &#125;,</div><div class="line">&#125;)</div></pre></td></tr></table></figure>
<h2 id="添加路由"><a href="#添加路由" class="headerlink" title="添加路由"></a>添加路由</h2><hr>
<h3 id="在index-js设置路由"><a href="#在index-js设置路由" class="headerlink" title="在index.js设置路由"></a>在index.js设置路由</h3><figure class="highlight javascript"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">import</span> &#123; Router, Route, Link, hashHistory, IndexRoute, useRouterHistory &#125; <span class="keyword">from</span> <span class="string">'react-router'</span>; <span class="comment">//router组件</span></div><div class="line"><span class="keyword">import</span> &#123; createHistory, createHashHistory &#125; <span class="keyword">from</span> <span class="string">'history'</span>; <span class="comment">//history组件</span></div><div class="line"><span class="keyword">import</span> Login <span class="keyword">from</span>  <span class="string">'./components/login.jsx'</span>; <span class="comment">//login自定义组件</span></div><div class="line"><span class="keyword">import</span> Index <span class="keyword">from</span>  <span class="string">'./components/index.jsx'</span>; <span class="comment">//index自定义组件</span></div><div class="line"><span class="keyword">let</span> history = useRouterHistory(createHashHistory)(&#123; <span class="attr">queryKey</span>: <span class="literal">false</span> &#125;);</div><div class="line"><span class="comment">//将其渲染到页面上id为test的DOM元素内</span></div><div class="line">ReactDOM.render(&lt;Router history=&#123;history&#125;&gt;</div><div class="line">    &lt;Route path="/"&gt;</div><div class="line">      &lt;Route path="index" component=&#123;Index&#125; /&gt;</div><div class="line">      &lt;IndexRoute component=&#123;Login&#125; /&gt;</div><div class="line">    &lt;/Route&gt;</div><div class="line">  &lt;/Router&gt;, </div><div class="line">document.body);</div></pre></td></tr></table></figure>
<h3 id="在components里login-ejs添加路由跳转"><a href="#在components里login-ejs添加路由跳转" class="headerlink" title="在components里login.ejs添加路由跳转"></a>在components里login.ejs添加路由跳转</h3><ul>
<li>添加登录按钮的click事件</li>
<li>添加loginSubmit属性以及跳转</li>
</ul>
<figure class="highlight jsx"><table><tr><td class="gutter"><pre><div class="line">1</div><div class="line">2</div><div class="line">3</div><div class="line">4</div><div class="line">5</div><div class="line">6</div><div class="line">7</div><div class="line">8</div><div class="line">9</div><div class="line">10</div><div class="line">11</div><div class="line">12</div><div class="line">13</div><div class="line">14</div><div class="line">15</div><div class="line">16</div><div class="line">17</div><div class="line">18</div><div class="line">19</div><div class="line">20</div><div class="line">21</div><div class="line">22</div><div class="line">23</div><div class="line">24</div><div class="line">25</div><div class="line">26</div><div class="line">27</div><div class="line">28</div></pre></td><td class="code"><pre><div class="line"><span class="keyword">import</span> React <span class="keyword">from</span> <span class="string">'react'</span>; <span class="comment">//导入react组件</span></div><div class="line"><span class="keyword">const</span> Login = React.createClass(&#123;</div><div class="line">  <span class="attr">contextTypes</span>: &#123;</div><div class="line">    <span class="attr">router</span>: React.PropTypes.object</div><div class="line">  &#125;,</div><div class="line">  <span class="attr">loginSubmit</span>: <span class="function"><span class="keyword">function</span>(<span class="params"></span>) </span>&#123;</div><div class="line">    <span class="keyword">this</span>.context.router.push(<span class="string">'/index'</span>); <span class="comment">//使用this.content进行跳转</span></div><div class="line">  &#125;,</div><div class="line">  render() &#123;</div><div class="line">    <span class="keyword">return</span> (</div><div class="line">      &lt;div className="container" id="login"&gt;</div><div class="line">        &lt;form id="login-form"&gt;</div><div class="line">          &lt;h3 className="text-center"&gt;login&lt;/h3&gt;</div><div class="line">          &lt;div className="form-group"&gt;</div><div class="line">            &lt;label&gt;account&lt;/label&gt;</div><div class="line">            &lt;input type="text" className="form-control" placeholder="Account" ref="loginName" required /&gt;</div><div class="line">          &lt;/div&gt;</div><div class="line">          &lt;div className="form-group"&gt;</div><div class="line">            &lt;label&gt;Password&lt;/label&gt;</div><div class="line">            &lt;input type="password" className="form-control" placeholder="Password" ref="loginPwd" required /&gt;</div><div class="line">          &lt;/div&gt;</div><div class="line">          &lt;button type="submit"  className="btn btn-default" onClick=&#123;this.loginSubmit&#125;&gt;登录&lt;/button&gt;</div><div class="line">        &lt;/form&gt;</div><div class="line">      &lt;/div&gt;</div><div class="line">    )</div><div class="line">  &#125;</div><div class="line">&#125;);</div><div class="line">module.exports = Login;</div></pre></td></tr></table></figure>
<h2 id="结束语"><a href="#结束语" class="headerlink" title="结束语"></a>结束语</h2><hr>
<p>从Angular转React中遇到不少问题呢，毕竟两者很多概念和使用方法都很不一样，使用过程中也是大开眼界了呀。<br><a href="https://github.com/godbasin/godbasin.github.io/tree/blog-codes/react-notes/2-create-login" target="_blank" rel="external">此处查看项目代码（仅包含app部分）</a><br><a href="http://react-notes.godbasin.com/2-create-login/index.html" target="_blank" rel="external">此处查看页面效果</a></p>
  
		
		<p style="margin-top:50px;">查看Github有更多内容噢：<a href="https://github.com/godbasin">https://github.com/godbasin</a></p>
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	<img src="https://github-imglib-1255459943.cos.ap-chengdu.myqcloud.com/2code2.jpg" width="200" height="200" style="display:block;margin: 0 auto;" />
	<p style="text-align: center;margin-top: 10px;margin-bottom: 20px;">码生艰难，写文不易，给我家猪囤点猫粮了喵~</p>
	<div class="author-right">
  		<p>作者：被删</p>
  		<p>出处：<a href="https://godbasin.github.io">https://godbasin.github.io</a></p>
  		<p>本文版权归作者所有，欢迎转载，但未经作者同意必须保留此段声明，且在文章页面明显位置给出原文连接，否则保留追究法律责任的权利。</p>
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  <strong class="toc-title">文章目录</strong>
  <ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#根据产品规划划分模块"><span class="toc-number">1.</span> <span class="toc-text">根据产品规划划分模块</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#主要页面逻辑"><span class="toc-number">1.1.</span> <span class="toc-text">主要页面逻辑</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#创建登录页面"><span class="toc-number">1.2.</span> <span class="toc-text">创建登录页面</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#React-Router"><span class="toc-number">2.</span> <span class="toc-text">React Router</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#安装使用"><span class="toc-number">2.1.</span> <span class="toc-text">安装使用</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#React-Router组件"><span class="toc-number">2.2.</span> <span class="toc-text">React Router组件</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#path属性"><span class="toc-number">2.3.</span> <span class="toc-text">path属性</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#Histories"><span class="toc-number">2.4.</span> <span class="toc-text">Histories</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#js中设置跳转"><span class="toc-number">2.5.</span> <span class="toc-text">js中设置跳转</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#添加路由"><span class="toc-number">3.</span> <span class="toc-text">添加路由</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#在index-js设置路由"><span class="toc-number">3.1.</span> <span class="toc-text">在index.js设置路由</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#在components里login-ejs添加路由跳转"><span class="toc-number">3.2.</span> <span class="toc-text">在components里login.ejs添加路由跳转</span></a></li></ol></li><li class="toc-item toc-level-2"><a class="toc-link" href="#结束语"><span class="toc-number">4.</span> <span class="toc-text">结束语</span></a></li></ol>
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